diff -r 137cb007b199 -r c69fedfbb9b3 graph_displayer_canvas.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/graph_displayer_canvas.h	Wed May 11 16:55:18 2005 +0000
@@ -0,0 +1,65 @@
+// -*- C++ -*- //
+
+#ifndef GRAPH_DISPLAYER_CANVAS_H
+#define GRAPH_DISPLAYER_CANVAS_H
+
+#include <all_include.h>
+#include <mapstorage.h>
+#include <libgnomecanvasmm.h>
+#include <libgnomecanvasmm/polygon.h>
+
+class GraphDisplayerCanvas : public Gnome::Canvas::CanvasAA
+{
+  typedef Gnome::Canvas::CanvasAA Parent;
+
+public:
+  GraphDisplayerCanvas(Graph &, CoordinatesMap &, MapStorage &);
+  virtual ~GraphDisplayerCanvas();
+
+  int changeLineWidth (std::string mapname);
+  int changeColor (std::string mapname);
+  int changeText (std::string mapname);
+  int rezoom();
+
+protected:
+
+  virtual bool on_expose_event(GdkEventExpose *);
+
+private:
+
+  ///Event handler function that handles dragging nodes of displayed_graph
+  bool event_handler(GdkEvent* e, Node n);
+
+  ///The graph, on which we work
+  Graph g;
+  ///Map of nodes of planefigure
+  Graph::NodeMap<Gnome::Canvas::Ellipse *> nodesmap;
+  ///Map of edges of planefigure
+  Graph::EdgeMap<Gnome::Canvas::Line *> edgesmap;
+
+  ///Map of texts to write on edges
+  Graph::EdgeMap<Gnome::Canvas::Text *> edgetextmap;
+
+  ///Group of graphical elements of displayed_graph
+  Gnome::Canvas::Group displayed_graph;
+
+  ///Here we store the maps that can be displayed through properties.
+  MapStorage mapstorage;
+
+  ///Indicates whether the button of mouse is pressed or not
+  bool isbutton;
+
+  ///At this location was the mousebutton pressed.
+  ///It helps to calculate the distance of dragging.
+  double clicked_x, clicked_y;
+
+  ///Remembers which Gnome::Canvas::Item was pressed.
+  ///this variable is needed, because
+  ///1. we cannot query the item at he cursor as fast as it could not cause a Segmentation Fault
+  ///2. we would like to handle only ony item per movement, therefore quering it is not a working solution
+  Gnome::Canvas::Item * active_item;
+
+
+};
+
+#endif //GRAPH_DISPLAYER_CANVAS_H